Combined ignition timer and fuel injection unit



.1951 J. J. BRODERICK 2,542,389

comsnmn IGNITION TIMER AND FUEL xmzmon mm Filed Nov. 9, 1946 4 Sheets-Sheet l zzvmvron. JOHN J. BEODEPICK Feb. 20, 1951 J. J. BRODERICK 2,542,339

comsnmn mumou TIMER AND FUEL mmcnou UNIT Filed Nov. 9, 1946 INVENTOR. JOHN J. Breoncmcz f WM ATT PNEY 4 Sheets-Sheet 2 Feb. 20, 1951 J; J. BRODERICK 2,542,339

COMBINED IGNITION TIMER AND FUEL INJECTION UNIT Filed Nov. 9, 1946 4 Sheets-Sheet 5 LHIHIH um I JNVENTOR. Jonw J- Bveoncmcz.

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Feb. 20, 1951 J, J BRODERlcK 2,542,389

COMBINED IGNITION TIMER AND FUEL INJECTION UNIT File d No". 9, 1946 4 Sheets-$heet 4 5 Y 38 4 45a I INVENTOR. JOHN J. .BIZODEEICK.

Patented Feb. 20, 1951 COMBINED IGNITION TIMER AND FUEL INJECTION UNIT John J. Broderick, Springfield, Mass, assignor to American Bosch Corporation, Springfield,

Mass., a corporation of N ew York Application November 9, 1946, Serial No. 708,833

4 Claims.

This invention relates to fuel injection apparatus and ignition apparatus for internal combustion engines and more particularly to an ignition timer and fuel injection pump unit which may be readily mounted upon the engine and which has a single drive connection therewith.

An object of the invention is to provide a combined fuel injection pump and ignition timer unit for internal combustion engines.

Another object of the invention is to provide such a unit which is interchangeable on existing engines with the ignition timing apparatus whereby such engines may be readily adapted for utilizing fuel injection to replace the carburetion system of such engines.

Another object of the invention is to provide a new and improved unit which comprises the ignition timing apparatus together with a fuel injection unit which meters, distributes and injects the fuel and which unit may be readily mounted on existing engines in place of the ignition timing and distributing means previously employed.

Another object of the invention is to provide a new and improved low cost, fuel injection pump for gasoline, spark ignition engines.

Another object of the invention is to provide a new and improved fuel injection unit for use on engines which is applicable to existing engines embodying carburetors with minimum changes and utilizing a single drive connection with which the engine is already provided for both ignition timing and fuel injection.

Other objects and advantages of the invention will be apparent from the following description taken in connection with the accompanying drawings. It will be understood that many changes may be made in the details of construction and arrangement of parts without departing from the invention as set forth in the accompanying claims, the preferred form having been given by way of illustration only.

Referring to the drawings:

Fig. 1 is a side view of an ignition timing and fuel injection pump unit embodying the invention;

Fig. 2 is a top or plan view thereof Fig. 3 is a sectional view taken on line 3--3 of Fig. 1 looking in the direction of the arrows;

Fig. 4 is a sectional view taken on line 4-4 of Fig. 3 looking in the direction of the arrows;

Fig. 5 is a fragmentary. sectional view taken on line 5-5 of Fig. 4 looking in the direction of the arrows; and

Fig. 6 is a fragmentary, sectional view taken on line 6--6 of Fig. 4 looking in the direction of the arrows.

The advantages of employing fuel injection systems rather than the conventional carburetor on engines have become so well known that it is not believed necessary to state them all here. The principal advantages of such systems are increased power, greater economy, broader fuel range, that is, the possibility of using cheaper grades of fuel with less tendency for detonation, and increased performance.

It is the principal object of the present invent on to provide means whereby such fuel injection system may be incorporated in existing carburetor type engines with minimum changes and at relatively economical installations by the provision of a new, combined ignition timing means and fuel injection apparatus adapted to be readily mounted upon the engine and be driven by the conventional engine drive already provided for driving the conventional ignition timing apparatus.

Referring more particularly to the drawings, wherein similar reference characters designate corresponding parts throughout the several views, the device embodying the invention includes a housing I having an open lower side which is adapted to be closed by the cover member 2 which is secured to the housing I by screws or the like 3 of suitable size and number and said cover 2 is provided with the integral tubular shank 4 adapted to fit within the recess or socket which is provided in conventional gasoline engines for receiving the drive of the ignit on timing apparatus. The shank 4 provides a bearing for the drive shaft 5 which extends through the distributor sleeve 9 in the housing I and through the shank 4 and is connected by gearing, not shown, with a rotatable part of the engine, preferably the valve operating shaft in the convent onal manner.

Adjacent the upper end portion of the housing I is provided the housing member 1 adapted to cont in the conventional ignition timing a paratus adapted to be operated by a cam, not shown, carried on the reduced extension 8 of the shaft 5.

The shaft 5 has the helical groove 9 adapted to draw excess lubricant from the gear chamber Ill out of said chamber and into the engine crankca e. Opening II is provided for external lubrication of the unit. The shaft 5 is al o provided with the gasket ring l2 to prevent the lubricant from entering the electrical compartment.

One end of a vacuum line (not shown) is consaid pinion l1 and shank l8 as previously denected to the outlet l3, which is connected to the scribed. peripheral groove 14, and said vacuum line is By adjusting the reduced extension ISA on the connected at its other end to the intake manifold eccentric sleeve l9b by means of the set screws 20 to draw out any fuel leaking in the direction of' and 2|, one of which is loosened and the other the electrical compartment and which might i n it is p l to adjust h p i i n f otherwise reach the electrical compartment. he ShQe IB and thereby a lu the p r n The plunger drive gear I5 is keyed to the shaft mid position along its axis to reduce the q y 5 by the key I s and said gear is adapted to be f fu l p p one n and l n usly inrotated upon rotation of said shaft and to simul-JO Crease e q y of fuel Du ped 0n the other taneously rotate the plunger drive pinion H which end of Bald P un er and thereby qualize the disis in mesh therewith and which is provided with' r bu on of fuel to all outlets. the reduced shank I8 which carries the plunger From the pl bOre 8 e fuel s p pe drive shoe [9 which is eccentrically positioned in through the ports 43: and 44 alternately as each a hole or groove in the upper end of said shank of the pumpi g portions of the plunger operates l8 and adapted to be rotated upon rotation of On its p g Stroke a sald fuel reaches the said pinion I I and shank i8. check valves 45 and 46. The seat 45a for the valve As shown in Fig. 6, the shank I8 is rotatably 45 is shown in full and the valve seat 46a for the m t d i th entri le lab having th valve 46 in section and these valves are operated r d c d xtensi |9 adapted t be engaged t alternately as fuel reaches the valves through the its opposite sides by the set screws 20 and 2| for ports 43 a 44 a the force o t el p rates adjusting the angular position of said shank I8 to move e valves a a st he act on of the and thereby adjusting the position of said shoe sprme o a uel m y p s through the cen- IQ for the ur ose hereinafter described. trel opemnes s sh n the alve s at 46a. The housing I is provided with a series of ra- 2s and reach the melmed ports 49 a d 50 through rially spaced holes 22, one of which is provided which it passes to the distributing groove 24 as for each combustion chamber adapted to receive Shown in F 3 and f m which it is distributed fuel from the fuel injection pump. While as to P propel Outlet- The Port? 49 and 50 are shown in Fig. 3, the present invention is provided incllhed and connect groove 24 w h check valves with six such outlets and is, therefore, adapted 3o 45 and 45 respectlvelyfor a six-cylinder engine, the pump could be By li ing a single common spring for the adapted for two, four, six or eight outlets as de- Check Valves a 6 of which it is desirable sired. The pump is adaptable for manifold into employ F mmmlum Q 1t 15 vposslble to jection, which is the intention of the pump shown Obtam a Smgle umt actmg as a Check Valve to in the drawings, but it will be understood that the h p unger ends thereby equalizing the quantity pump could also adapted for cylinder injection of fluid distributed to each of the outlets 22.

Each of the outlets 22 is provided with a port .Thefiutlets 22 are F connefztfiad b Suitable or groove 23 adapted to connect its respective outh esPectlve fufal lPlectwn P let 22 with the distributing groove 24 in the dis- Whwh 1S posltloned m an Openme m the mamfold tributing sleeve 6 successively upon rotation of Cylinder to thereby Provide fuel for the opera said sleeve 6 which is keyed to the shaft 5 as non of the engmeshown in Fig. 3 and adapted to rotate therewith. It will be that Witt} the present invention The distributor sleeve 6 may be constructed of that by replacmg the convefltional ignition molded nylon or other suitable material. mg apparatus of a conventional gasoline gin The housin is also provided with the fuel ins h as a bus 9 F Q enema Wlth the igmtlon let adapted to be connected a ,f el line timingand fuel lIlJCCtlOlJ apparatus of the present from a fuel supply tank and a throttle valve is mverltlon a by rep acing the carburetor type provided for controlling the amount of fuel fed m w a l ct on type manifold that to the pumping unit If a booster pump is it IS possible to readily convert such engine from ployed in the fuel line between the supply tank a carburetor type engme to a fuel mJectwn type and injection pump, an outlet 25a may be com engine with all the benefits of such type of ennected to a return line to the fuel supply tank. gme as Set forth f and that the present The throttle valve comprises the valve 26 in the vehtlon may be readlly connected to the Single restricted opening 21 and said valve 26 is adapt- F e dy D Y F Oh e gine for operated to be controlled by the spring 28 and lever 29 53 mg the lgmtlon m F which is pivotally mounted at 30 on the cover FY9111 t e f0r g01ng It Will be seen that I have 3| which is secured to the housin I by screws or prv1ded effluent and econommal means the like $2' The valve 26 extends through an for obtaining all of the objects and advantages opening in the diaphragm s3 and is secured thereof to by means of the enlarged head portion 34 and Havmg descllbed my mventloni I clalmf nut 35 which is threaded on the valve member devlce of the qrtaracter descnbed' and adapted to be tightened against said diag fi g' gfi gg fi g ggg gig i. doublg n 1v means an g gg 33 to retam the parts m assembled rela' means intermediate said pumping ends of said plunger and operatively connected with said drive means for reciprocating said plunger in said bore, a single distributing means operated by said drive means for distributing fuel from said fuel injection pump, fuel passageways from ad- Fuel reaching the pump enters the fuel supply chamber 36 from which it passes through the restricted opening 21' and ports 31 to the plunger bore 38 containing the double ended plunger element having the pumping Portions 39 adjacent its 7n jacent the opposite ends of said bore to said dispp e and/the central reduced'port n tributing means, check valve means in each of adapted to receive the plunger drive shoe l9 which said passageways intermediate said pump and operates against the opposite shoulders 41 and 42 Said distributing means and a Sing1e spring ofsaid reduced centralportiontoreciprocatesaid gaging said check valve means adjacent its ends plunger in the plunger bore 38 upon rotation of and operating said check valve means.

2. In a device of the character described, a fuel injection pump, comprisinga bore and double ended plunger adapted to reciprocate in said bore, a shaft, gear means operatlvely connected to said shaft, an eccentric operated by said gear means for reciprocating said plunger in said bore, means for supplying fuel to said bore means surrounding said shaft for distributing fuel pumped by said pumping plunger and fuel passageways from adjacent the opposite ends of said bore to said distributing means.

3. In a device of the character described, a unit including ignition timing means for a circuit breaker and a fuel injection pump, said unit being adapted to supply ignition and fuel to an internal combustion engine, said fuel injection pump comprising a housing having a bore and a double ended plunger pumping element in said bore, a shaft driven by the engine for operating said circuit breaker and fuel injection pump, a distributor sleeve on said shaft and rotatable upon rotation of said shaft, a fuel passageway from said pump to said distributing sleeve, said distributing sleeve surrounding said shaft and having distributing means thereon and cooperating with spaced outlets in said housing for distributing fuel received from said injection pump, and means operatively connected to said shaft for operating said pumping plunger of said fuel injection pump, said means comprising gear means operated by said shaft, pinion means operated by said gear means, an eccentric on said pinion means and engaging said plunger for reciprocating said plunger in said bore and means associated with said pinion means for adjusting said plunger along its axis to control the quantity of fuel supplied by each of the pumping ends of said plunger.

4. In a device of the character described, a

unit including ignition timing means for a circuit breaker and a fuel injection pump, said unit being adapted to supply ignition and fuel to an internal combustion engine, said fuel injection pump comprising a housing having a bore and a double ended plunger pumping element in said bore, a shaft driven by the engine for operating said circuit breaker and fuel injection pump, a distributor sleeve on said shaft and rotatable upon rotation of said shaft, a fuel passageway from said pump to said distributing sleeve, said distributing sleeve surrounding said shaft and having distributing means thereon'and cooperating with spaced outlets in said housing for distributing fuel received from said injection pump, and means operatively connected to said shaft for operating said pumping plunger of said fuel injection pump, said means comprising gear means operated by said shaft, pinion means operated by said gear means, an eccentric on said pinion means and engaging said plunger for reciprocating said plunger in said bore.

JOHN J. BRODERICK.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 1,292,981 Weiss Jan. 28, 1919 1,791,600 Onions Feb. 10, 1931 1,901,448 High Mar. 14, 1933 2,050,392 Starr Aug. 11, 1936 2,319,566 Sunderman et al. May 18, 1943 FOREIGN PATENTS Number Country Date 416,676 Great Britain Sept. 19, 1934 

